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In this tutorial, we will see how to get the IP address and host name using Java API.

InetAddressGet the host name in Java using

The package java.net contains classes for handling the IP address and host name of the current machine InetAddress.

getLocalHost()By collecting the system's IP address using the function of the same class , we can get the system name of the Windows computer using InetAddressthe class in the java.net package getHostName().

If the Security Manager is not authorized to obtain the address of the local host, getHostName()a textual representation of the IP address is provided.

InetAddressgetLocalHost()The and methods of the class getByName (String host)handle local and remote hosts, respectively.

grammar:

InetAddress inetadd = InetAddress.getLocalHost();

This function will inetaddcreate an instance of the local server for running the Java program InetAddress. As a result, the address of the local host is returned.

InetAddressThis is done by retrieving the host name from the system and converting it to .

InetAddressDemonstrates how to use the class to get the host name in Java

First, import the following libraries.

java.net.InetAddress

We will show you how to retrieve the host name in Java through a simple example.

InetAddress inetadd = InetAddress.getLocalHost();

We will use the method to create an instance of for a local server InetAddressnamed that is run by a Java program .inetaddInetAddress

String name = inetadd.getHostName();

We will use getHostName()the method to get the host name and save it in namea string type variable called .

String address = inetadd.getHostAddress();

After that, with the help of getHostAddress()the method, we will get the host address and save it in addressa string type variable called . This will throw if it cannot resolve the local or site hostname to an address UnknownHostException.

source code:

import java.net.InetAddress;
import java.net.UnknownHostException;
public class HostnameExample {
  public static void main(String[] args) {
    try {
      InetAddress inetadd = InetAddress.getLocalHost();
      String name = inetadd.getHostName();
      String address = inetadd.getHostAddress();
      System.out.println("HostName is : " + name);
      System.out.println("Host Address is: " + address);
    } catch (UnknownHostException u) {
    }
  }
}

Output:

$javac HostnameExample.java
$java -Xmx128M -Xms16M HostnameExample
HostName is : f97aedb6192a
Host Address is: 127.0.0.2